Venus Williams of the U.S. serves to Sandra Zahlavova of the Czech Republic during their second round match at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. 19, 2011. (AP Photo/Mark Baker)

Mark Baker

Philipp Gasser from Switzerland, from left, Germany's Simon Stickel, Daniel Bohnacker, and Sweden's Michael Forslund compete during their small final race at the Cross World Cup in Grasgehren, southern Germany, on Saturday, Jan. 29, 2011. (AP Photo/Matthias Schrader)

Liverpool's Dirk Kuyt, right, celebrates after scoring a goal against Sparta Prague during the second leg of their round of 32 Europa League soccer match at Anfield, Liverpool, England, Thursday, Feb. 24, 2011. (AP Photo/Tim Hales)

Philadelphia 76ers' Andre Iguodala goes up for a dunk in the second half of an NBA basketball game against the Detroit Pistons, Friday, Feb. 25, 2011, in Philadelphia. Philadelphia won 110-94. (AP Photo/Matt Slocum)

Bethanie Mattek Sands, of the United States, returns a shot to Vera Dushevina of Russia, during her opening round match at the BNP Paribas Open tennis tournament in Indian Wells, Calif., Wednesday, March 9, 2011. (AP Photo/Darron Cummings)

Darron Cummings

Members of the U.S. men's and women's teams are framed by arena drapes during a training session for the World Short Track Speed Skating Championships at the Motorpoint Arena in Sheffield, England, Thursday, March 10, 2011. The event runs from Friday March 11 until Sunday March 13. (AP Photo/Matt Dunham)

Japan's Eriko Hirose hits a shot during her women's singles final match against Wang Shixian of China at the All England Badminton Championships in the National Indoor Arena, Birmingham, England, Sunday, March 13, 2011. (AP Photo/Simon Dawson)

Steam rises off a horse as it gets a bath after a morning workout at Churchill Downs Thursday, May 5, 2011, in Louisville, Ky. (AP Photo/Charlie Riedel)

Charlie Riedel

A boogie boarder rides a wave at the "Wedge" in Newport Beach, Calif., Thursday, May 19, 2011. (AP Photo/Chris Carlson)

Daria Kondakova, of Russia, performs with a hoop during her final apparatus program at the 27th European Rhythmic Gymnastics Championship in Minsk, Belarus, Sunday, May 29, 2011. Kondakova won second place. (AP Photo/Sergei Grits)

US swimmer Annie Chandler on her way to win the final of the women's 50m breaststroke, at the Paris Open swimming championship, Sunday June 26, 2011. (AP Photo/Remy de la Mauviniere)

REMY DE LA MAUVINIERE

The pack is reflected in Allagnon river near the village of Lempdes sur Allagnon as they ride during the 9th stage of the Tour de France cycling race over 208 kilometers (129 miles) starting in Issoire and finishing in Saint Flour, central France, Sunday July 10, 2011. (AP Photo/Christophe Ena)

Christophe Ena

Competitors swim in the Seine River during the Paris Triathlon competition in Paris Sunday, July 10, 2011. (AP Photo/Lionel Cironneau )

Lionel Cironneau

National League's Prince Fielder of the Milwaukee Brewers hits a three-run home run against American League's C. J. Wilson of the Texas Rangers during the fourth inning of the MLB All-Star baseball game Tuesday, July 12, 2011, in Phoenix. The National League won 5-1. (AP Photo/David J. Phillip)

David J. Phillip

The Italian team perform their routine in the synchronised swimming Technical Teams final at the FINA 2011 Swimming World Championships in Shanghai, China, Tuesday, July 19, 2011. (AP Photo/Ng Han Guan)

Ng Han Guan

Uruguay's players celebrate holding the Copa America at the end of the final soccer match with Paraguay in Buenos Aires, Argentina, Sunday, July 24, 2011. Uruguay won the Copa America for a record 15th time after beating Paraguay 3-0 with two goals scored by Diego Forlan and one by Luis Suarez. (AP Photo/Roberto Candia)

U.S. Michael Phelps grimaces as his girlfriend Nicole Johnson, right, smiles at him at the FINA Swimming World Championships in Shanghai, China, Friday, July 29, 2011. (AP Photo/Wong Maye-E)

Wong Maye-E

Michael Phelps of the U.S. swims on the way to finishing second in the men's 200m Individual Medley final at the FINA Swimming World Championships in Shanghai, China, Thursday, July 28, 2011. (AP Photo/Gero Breloer)

Houston Texans' Mario Williams cools off during the first day of NFL football training camp Monday, Aug. 1, 2011, in Houston. (AP Photo/David J. Phillip)

Current British long jump champion J.J. Jegede is silhouetted as he performs an exhibition jump over three Mini cars backdropped by Tower Bridge in London, Wednesday, Sept. 28, 2011. The event took place Wednesday to mark the launch of the Mini London 2012 edition models, of which 2,012 will be produced ahead of the London 2012 Olympic Games. (AP Photo/Matt Dunham)

Matt Dunham

Milwaukee Brewers' Prince Fielder hits a two-run home run during the seventh inning of Game 1 of baseball's National League division series against the Arizona Diamondbacks Saturday, Oct. 1, 2011, in Milwaukee. (AP Photo/David J. Phillip)

USA's Jordyn Wieber performs on the balance beam on her way to winning the women's individual all-round final of the Artistic Gymnastics World Championships in Tokyo, Japan Thursday, Oct. 13, 2011. (AP Photo/Koji Sasahara)

Koji Sasahara

Drivers crash during a wreck that involved 15 cars during the IndyCar Series' auto race at Las Vegas Motor Speedway in Las Vegas on Sunday, Oct. 16, 2011. Wheldon was airlifted to a hospital. Will Power (12), of Australia, is airborne at left. (AP Photo/Las Vegas Review-Journal, Jessica Ebelhar)

New Zealand All Blacks captain Richie McCaw holds up the Webb Ellis trophy as teammates celebrate after their Rugby World Cup final win over France in Auckland, New Zealand, Sunday, Oct. 23, 2011. (AP Photo/Christophe Ena)

Christophe Ena

Members of Canada's swimming women's 4x100m medley relay team arrive wearing professional Mexican wrestling masks for the final at the Pan American Games in Guadalajara, Mexico, Friday, Oct. 21, 2011. (AP Photo/Julie Jacobson)

Julie Jacobson

Cuba's Yarisley Silva celebrates after clearing the bar at 4.75m to win the gold medal in the women's pole vault event at the Pan American Games in Guadalajara, Mexico, Monday, Oct. 24, 2011. (AP Photo/Julie Jacobson)

Julie Jacobson

North Carolina forward John Henson (31) tries to block a shot by Michigan State center Adreian Payne (5) during the first half of the Carrier Classic NCAA college basketball game aboard the USS Carl Vinson, Friday, Nov. 11, 2011, in Coronado, Calif. (AP Photo/Mark J. Terrill)